The Holiday Dip Cooler in the Potted Pine pattern by Rowe Pottery is the perfect gift for holiday entertaining. Fill the bottom piece of the Potted Pine Dip Cooker with ice to keep dips cool, or add hot water to keep them warm! Microwave and Dishwasher Safe. Because all salt glazed pottery is handmade and hand painted, you will find originality and uniqueness in each piece. The size, shape, and pattern of each piece will vary. Also, color variations, which occur during the firing process, create the high and low color tones that give your piece its unique character. Natural color tones of the pottery pieces vary ranging from stone gray to tan, with cobalt blue accents.